Fantastic. Pusher is an awesome product that eliminates the headaches associated with building a real-time product. I'll never build a chat with polling again. I use it for my website and haven't had any problems (well one, but it was mostly caused by my inexperience with rails)<p>The best part is the pricing, especially for startups. 20 concurrent users for free is a big number. Compare it to something like MailGun, and it seems like $20/month gets you a lot more value.